Wiegand interface

« Back to Glossary Index

In the commercial and residential burglar alarm industry, the Wiegand interface is a crucial component of security systems. It is a communication protocol that allows access control systems to communicate with card readers and other security devices. The Wiegand interface is named after its inventor, John R. Wiegand, who developed it in the 1970s. The interface consists of two wires that carry data from the card reader to the access control system. One wire carries a binary code that represents the card’s facility code, while the other wire carries a binary code that represents the card’s ID number. The Wiegand interface is widely used in security systems because it is simple, reliable, and secure.

CGSmith is a business and residential security system installation and monitoring company based out of the Milwaukee WI area. The company offers a wide range of security solutions, including burglar alarms, fire alarms, access control systems, and video surveillance systems. CGSmith understands the importance of the Wiegand interface in security systems and offers installation and maintenance services for Wiegand-based access control systems. The company’s team of experienced technicians can help clients design and install a customized security system that meets their specific needs. CGSmith also offers 24/7 monitoring services to ensure that clients’ properties are always protected.

If you are interested in learning more about the Wiegand interface and how it can enhance your security system, CGSmith is here to help. You can visit the Contact Us page on the company’s website to schedule a consultation with one of their security experts. The team at CGSmith is committed to providing top-quality security solutions and excellent customer service. Whether you need a new security system installed or an existing system maintained, CGSmith has the expertise and resources to get the job done right. Contact CGSmith today to learn more about how they can help you protect your property and assets.


1. What is a Wiegand interface in burglar alarms?

A Wiegand interface is a type of communication protocol used in burglar alarms to transmit data between the alarm system and the access control devices. It consists of two wires, one for data transmission and the other for power supply, and is known for its high security and reliability.

2. How does a Wiegand interface work in burglar alarms?

In a Wiegand interface, data is transmitted in the form of binary code, with each bit represented by a pulse of a specific duration. The alarm system sends a signal to the access control device, which responds with a signal of its own. The signals are then decoded by the alarm system to determine whether access should be granted or denied.

3. What are the benefits of using a Wiegand interface in burglar alarms?

One of the main benefits of using a Wiegand interface in burglar alarms is its high level of security. The binary code used in the interface is difficult to intercept or tamper with, making it a reliable method for transmitting data. Additionally, the interface is compatible with a wide range of access control devices, making it a versatile option for burglar alarm systems.

« Back to Glossary Index